Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S
The AirTAC SAIJ40X350-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 320-350 mm window. Delivering 879 N of push force at 0.7 MPa, it is equipped with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread.
This model includes a magnetic piston (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel integrates dual-side sensor grooves, and the adjustable stopper functions purely as a travel end-point tuner, not a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S Is Used
Stroke Calibration
Dial in the exact end-position within the 320-350 mm range during commissioning without adding external mechanical stops.
Product Changeover
Quickly adjust the travel end-point on packaging lines when handling different product sizes or formats.
Machine Setup
Fine-tune the retract distance on automated machinery to perfect the picking or pressing depth dynamically.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S the Right Cylinder?
Choose this 40 mm bore when 628 N of thrust at 0.5 MPa is required, stepping up from a 32 mm bore (402 N) or down from a 63 mm bore (1559 N). The adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers without swapping the cylinder. For a fixed travel length, the standard SAI series is a simpler alternative.
Because the 350 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the rod. This SAIJ model uses a reduced mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. If load-holding without live air pressure is needed, consider the SAIL or BSAI series instead.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30S FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the 350 mm nominal stroke by up to 30 mm, creating a usable travel window between 320 and 350 mm to fine-tune the end position.
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